三稱重量。質量好(hao)的(de)(de)電(dian)線(xian)(xian)(xian)電(dian)纜，一(yi)般每100m重量都在規定的(de)(de)重量范圍內。質量差的(de)(de)電(dian)線(xian)(xian)(xian)重量不(bu)(bu)足(zu)，要(yao)么長度不(bu)(bu)夠(gou)，要(yao)么電(dian)線(xian)(xian)(xian)銅(tong)(tong)(tong)芯(xin)(xin)雜(za)質過多。四比價格(ge)。購買時，要(yao)當心，別為商家標榜的(de)(de)''沖昏(hun)了頭腦，終上當受騙。五看銅(tong)(tong)(tong)質。合格(ge)的(de)(de)銅(tong)(tong)(tong)芯(xin)(xin)電(dian)線(xian)(xian)(xian)銅(tong)(tong)(tong)芯(xin)(xin)應該是紫紅色(se)、有(you)光澤、手感軟。而的(de)(de)銅(tong)(tong)(tong)芯(xin)(xin)線(xian)(xian)(xian)銅(tong)(tong)(tong)芯(xin)(xin)為紫黑色(se)、偏黃或(huo)偏白(bai)，電(dian)纜電(dian)線(xian)(xian)(xian)價格(ge)表，雜(za)質多，機械強度差，韌性(xing)不(bu)(bu)佳(jia)，稍用力即(ji)會折斷，而且電(dian)線(xian)(xian)(xian)內常有(you)斷線(xian)(xian)(xian)現象。

施工人員在(zai)(zai)制作(zuo)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)接頭(tou)(tou)(tou)過程(cheng)中(zhong)，耐火電(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)，如(ru)果有(you)接頭(tou)(tou)(tou)壓接不(bu)緊、加熱不(bu)充分等(deng)原網，都會(hui)導致電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)頭(tou)(tou)(tou)絕(jue)緣(yuan)(yuan)(yuan)降低(di)，從而引發事故。4、絕(jue)緣(yuan)(yuan)(yuan)受潮。這種情況也很(hen)常見(jian)，一般發生在(zai)(zai)直(zhi)埋或排管里的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)接頭(tou)(tou)(tou)處(chu)(chu)。比如(ru)：電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)接頭(tou)(tou)(tou)制作(zuo)不(bu)合格和(he)在(zai)(zai)潮濕的(de)(de)氣候條件下做接頭(tou)(tou)(tou)，會(hui)使接頭(tou)(tou)(tou)進水或混入水蒸(zheng)氣，時間久了在(zai)(zai)電(dian)(dian)(dian)(dian)場(chang)作(zuo)用(yong)下形成水樹枝，逐(zhu)漸(jian)損害電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)絕(jue)緣(yuan)(yuan)(yuan)強度(du)而造成故障。5、環(huan)境和(he)溫度(du)。電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)所處(chu)(chu)的(de)(de)外界環(huan)境和(he)溫度(du)會(hui)造成電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)溫度(du)過高(gao)、絕(jue)緣(yuan)(yuan)(yuan)擊穿，甚(shen)至爆1炸(zha)起(qi)火。6、化學(xue)腐蝕(shi)。電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)直(zhi)接埋在(zai)(zai)有(you)酸堿作(zuo)用(yong)的(de)(de)地區，往往會(hui)造成電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)的(de)(de)鎧(kai)裝、鉛皮或外護層被腐蝕(shi)，保護層因長期遭受化學(xue)腐蝕(shi)或電(dian)(dian)(dian)(dian)解腐蝕(shi)，致使保護層失效，絕(jue)緣(yuan)(yuan)(yuan)降低(di)，黃山(shan)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)，也會(hui)導致電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)(lan)故障。

如何選擇電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件產品？（1）電(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣性(xing)(xing)能(neng)(neng)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣性(xing)(xing)能(neng)(neng)的(de)(de)(de)(de)好壞(huai)是(shi)評(ping)判電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件品質(zhi)的(de)(de)(de)(de)首要(yao)原則。主(zhu)要(yao)考慮電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場分布(bu)是(shi)否(fou)合(he)理，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜批發廠家，改善電(dian)(dian)(dian)(dian)(dian)(dian)(dian)場分布(bu)的(de)(de)(de)(de)措(cuo)施(shi)是(shi)否(fou)恰當，材料的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣強(qiang)度、介質(zhi)損(sun)耗(hao)和(he)(he)產品的(de)(de)(de)(de)絕緣裕度等。（2）密封性(xing)(xing)能(neng)(neng)。密封防(fang)潮性(xing)(xing)能(neng)(neng)直接影響(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣性(xing)(xing)能(neng)(neng)和(he)(he)使(shi)用壽命(ming)。終端的(de)(de)(de)(de)密封結構是(shi)否(fou)可靠、穩定。一(yi)(yi)般來說(shuo)，中(zhong)間(jian)接頭(tou)也應(ying)有一(yi)(yi)個與之相匹配金(jin)屬(shu)防(fang)潮外殼，特(te)別是(shi)直埋或使(shi)用在潮濕環(huan)境(jing)中(zhong)。（3）機械性(xing)(xing)能(neng)(neng)。電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件應(ying)該有足夠(gou)的(de)(de)(de)(de)抗彎、防(fang)震(zhen)的(de)(de)(de)(de)能(neng)(neng)力(li)。中(zhong)間(jian)接頭(tou)應(ying)能(neng)(neng)承受一(yi)(yi)定的(de)(de)(de)(de)拉力(li)和(he)(he)防(fang)止(zhi)外力(li)損(sun)傷的(de)(de)(de)(de)措(cuo)施(shi)。（4）工藝(yi)性(xing)(xing)能(neng)(neng)。工藝(yi)性(xing)(xing)能(neng)(neng)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)纜附(fu)件設(she)計(ji)和(he)(he)選型的(de)(de)(de)(de)一(yi)(yi)個重(zhong)要(yao)的(de)(de)(de)(de)條件，標(biao)準設(she)計(ji)、工藝(yi)可靠，提升(sheng)品質(zhi)的(de)(de)(de)(de)重(zhong)要(yao)手段。